Monthly weather forecast and Climate
Rio de Janeiro, Brazil BR

Warmest months (with highest average high temperature) are January and February (30.2°C).
Month with lowest average high temperature is July (25°C).

Month with highest average low temperature is February (23.5°C).
Coldest month (with lowest average low temperature) is July (18.4°C).

Months with highest relative humidity are March, April, May, October and December (80%).
Months with lowest relative humidity are July and August (77%).

Wettest month (with highest rainfall) is January (137.1mm).
Driest month (with lowest rainfall) is July (41.9mm).

Months with highest number of rainy days are January and December (11 days).
Month with lowest number of rainy days is July (4 days).

Best months for swimming (with highest average sea temperature) are February and March (26°C).
Coldest months (with lowest average sea temperature) are July, August, September and October (22°C).

Month with longest days is December (Average daylight: 14h).
Months with shortest days are May, June, July and August (Average daylight: 11h).

Month with most sunshine is February (Average sunshine: 7.2h).
Months with least sunshine are September and October (Average sunshine: 4.9).

Months with highest UV index are January, February, March, November and December (UV index 12).
Months with lowest UV index are June and July (UV index 5).